Filter having an automatic control of flow

Abstract

The present invention discloses a filter with an automatic control of flow, which contains a housing having a water inlet and a water outlet on one end, a bottom cover connecting to the other end of the housing and a filter material provided in the housing, comprising an outlet end fluidly connecting with the water outlet through a flow control unit. Based on the structure design of the flow control unit, the filter of the present invention can remind users to replace the filter materials in an easy and visible way at the time when the filter materials reach the end of working period.

What is claimed is: 
     
       1. A filter with an automatic control of flow, comprising a housing having a water inlet and a water outlet on one end thereof, a bottom cover connected to the other end of the housing and a filter material provided in the housing, wherein the filter material further comprises an outlet end fluidly connected with the water outlet through a flow control unit;
 a first connecting portion is arranged on an axis of the connecting cap and is fluidly connected to the outlet end of the filter material; 
 the flow control unit comprises a connecting cap fluidly connected with the filter material, an end cap fluidly connected with the water outlet of the housing, and a shell that provides a cavity and respectively sealingly connects with the connecting cap and the end cap, wherein a gear unit is disposed in the cavity, a flow regulating notch is formed on the end cap, a second connecting portion is arranged on one surface of the end cap to connect with the water outlet on the housing, two gear shafts and a stopper are arranged on the other surface of the end cap, an inlet zone is defined at the junction of the shell and the connecting cap, and the gear unit disposed in the cavity is sheathed on the two gear shafts; 
 the gear unit comprises a water sealing gear, a plurality of transmission gears and an impeller, wherein the water sealing gear is contacted with the end cap, a lug boss is disposed on a contacting surface between the water sealing gear and the end cap and is engaged with the flow regulating notch, and an annular groove formed on the water sealing gear is coupled with the stopper. 
 
     
     
       2. The filter according to  claim 1 , wherein the impeller and the water sealing gear are coaxially arranged. 
     
     
       3. The filter according to  claim 1  or  claim 2 , wherein at least one groove is formed on the second connecting portion and a sealing ring is provided in each groove. 
     
     
       4. The filter according to  claim 1 , wherein a flow guiding plate is disposed above the inlet zone.